For an example of anapests, I always turn to "twas the NIGHT before CHRISTmas and ALL through the HOUSE / not a CREAture was STIRring, not EVen a MOUSE"

Just recalling that famous line helps me check to see if I've gotten the meter right.

Also, if you recall any Dr. Seuss, he often used that meter in his writing as well:

then he SHOOK! what he SAW was a SHOCKing surPRISE!every WHO down in WHOville, the TALL and the SMALL,was SINGing! withOUT any PRESents at ALL!

Note that "every" is another one of those words that could be used for two syllables or three, depending on what fits the meter. Also, some of the lines do start with only one unstressed syllable, but then follow the anapestic meter all the way through. Slight variations like that sometimes flow better...

if we SING in the RAIN we beCOME wet and COLDif we SING in the SNOW it is NEVer as BOLDyet we KNOW when it's SPRING it is EVer so NICEso we WAIT until the CLOUDS do so COVer the SKY once the SUMmer is HERE all the SONGS are now OLD

if we SING in the RAIN we beCOME wet and COLDif we SING in the SNOW it is NEVer as BOLDyet we KNOW when it's SPRING it is EVer so NICEso we WAIT until the CLOUDS do so COVer the SKY once the SUMmer is HERE all the SONGS are now OLD

Very nice! You seem to be quite comfortable with anapests!

Two small things, both in the fourth line:

"until the" is three unaccents in a row...you can easily fix this by making it "'til the CLOUDS" or "until CLOUDS" (either abbreviate "until" or drop "the"). One of the fun things about poetry is that there is usually more than one way to solve a problem.

The other thing is not a meter issue, but a matter of cumbersome wording... "clouds do so cover the sky" sounds cumbersome because of the word "so".